Chemistry
Terylene is a condensation polymer of ethylene glycol and which acid?

Salicylic acid
Benzoic Acid
Terephthalic acid
Phthalic acid

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Chemistry
All isotopes of the same element have ________

Different atomic numbers and the same atomic mass
The same atomic number and the atomic mass
The same atomic number but different atomic masses
Different atomic numbers and different atomic mass

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